Как разделить коллекцию строк на группы, используя LINQ ?

static void Main(string[] args)
{
    string[] email = {"One@devcurry.com", "Two@devcurry.com",
                        "Three@devcurry.com", "Four@devcurry.com",
                        "Five@devcurry.com", "Six@devcurry.com",
                        "Seven@devcurry.com", "Eight@devcurry.com"};

    var emailGrp = from i in Enumerable.Range(0, email.Length)
                                    group email[i] by i / 3;

    foreach(var mail in emailGrp)
        SendEmail(string.Join(";", mail.ToArray()));
                                         

    Console.ReadLine();
}

     
static void SendEmail(string email)
{
    // Assuming that you have code for sending mails here
    Console.WriteLine(email);
    Console.WriteLine("--Batch Processed--");
}